Apparatus for removing foreign matter from india-rubber, gutta-percha, balata, and the like.



M. M. DESSAU.

APPARATUS FOR REMOVING FOREIGN MATTER mom INDIA RUBBER, GUTTA PEBGHA, I

BALATA, AND THE LIKE. APPLICATION FILED NOV. 23, 1910.

999,100. Patented July 25,1911. 2 SHEETS-SHEET 1. I

Wlj h 2L in x n 1 l T" G-\--- n 5 1 5 41 Q V Z/ COLUMBIA PLANDORAPH 50..WASHINGTON. D. Cv

M. M. DESSAU. APPARATUS FOR REMOVING FOREIGN MATTER FROM INDIA RUBBER,GUTTA PERGHA,

BALATA, AND THE LIKE. APPLIOATION FILED NOV. 23, 1910.

Patented July 25, 1911.

Z SHEETS-SHEBT 2.

view 1.11M,

COLUMBIA PMNDURAPH C0,, WASHINGTON, n. c.

' UNITE STATES TNT @FFIQ.

IVIORLANI) IEICHOLL DESSAU, OF LONDON, ENGLAND.

APPARATUS FOR REMOVING FOREIGN MATTER FROM INDIA-RUBBER, GU'I'TA-PERGHA.BALATA, AND THE LIKE.

To all whom it may concern:

Be it known that I, MORLAND Micriom. DESSAU, a citizen of the UnitedStates of America, residing at London, England, have inventedImprovements in Apparatus for Removing Foreign Matter from India-Rubber,Gut-ta-Percha, Balata, and the Like, of which the following is aspecification.

In apparatus designed to subject crude india rubber, gutta percha,balata and the like (hereinafter referred to as rubber) to the action ofrolls in the presence of water for the purpose of liberating or washingout impurities, it is found that heavier par ticles of the impuritiessettle upon the rubber and also collect in the usual space or chamber,or spaces or chambers containing the washing liquid, with the resultthat such impurities are again taken up by the rubber so that althoughactually cleaned, the rubber is liable to be again made dirty.

The object of this invention is to avoid this objection by keeping allimpurities removed from the rubber in suspension in the washing water,so that they can be readily removed with the overflow water and thus beprevented from being again taken up by the rubber. For this purposemeans are provided for continuously agitating the liquid in the regionor regions where settling of the impurities tends to occur. Theagitation may be eflected by one or more stirring devices of anysuitable kind, depending upon the form of the washing machine to whichthe invention is applied.

In the accompanying drawings, Figures 1 and 2 are sectional elevations,at right angles one to another, of a rubber washing machine embodyingthe invention.

In this example, the washing machine has a pair of rolls (4 locatedbetween walls or screens 6 in a trough c with an overflow space (Z ateach side into which water surges under the action of a platen e that isointed at f to a vertically adjustable screw 9 so that it is adapted torock as the rubber under treatment moves on its passage to and betweenthe rolls and produce a surging action on the water fed into themachine. A spindle h is mounted with its axis parallel to the axes ofthe rolls a, in the lower or other part of each of the overflow spaces(Z between the walls or screens .7) and the outer walls of the trough 0.Each spindle h is Specification of Letters Patent.

Application filed November 23, 1910.

Patented July 25, 1911. Serial No. 593,927.

provided with a series of blades, arms or fins i (hereinafter calledblades) arranged radially, or at a suitable inclination to the spindle.The blades 71 may all be alike, or they may be dissimilar, so as to tendto produce motion of the water, in which they are immersed, in onedirection or in a number of diflerent directions at one time and thusefl'ectually prevent heavy particles settling upon the rubber or in thespaces (Z, and insure their being kept in suspension until removed fromthe machine. Conveniently, the blades 71 may extend with an inclinationlongitudinally of the spindle it and extend alternately in oppositedirections as shown. The spindles may be operated in any suitable way,as by chain and sprocket gearing 7c, stufling boxes m being provided,where required, to secure fluid tightness of the overflow spaces clwhere the spindles it pass through the end wall or walls thereof.

The particular washing machine hereinbefore referred to and taken as anexample for embodying the present invention, forms the subject ofLetters Patent No. 960846. The invention can however be applied inconnection with washing machines of various kinds designed for removingimpurities from india rubber and like material and having one or morewater spaces wherein heavy particles might collect.

What I claim is 1. In a rubber washing machine, a trough having anoverflow at the top and perforated side walls or screens arranged toform within the trough a central rubber washing compartment and with thesides of the trough, separate liquid spaces closed at the bottom andcommunicating with the overflow at the top, rubber washing rolls in saidcentral compartment, agitating devices arranged in the lower portions ofsaid liquid spaces and means for driving said agitating devices.

2. In a rubber washing machine, the combination with a trough, a pair ofrolls therein, a platen mounted to oscillate above said rolls, andperforated side walls or screens arranged to form within the trough arubber washing compartment containing the rolls and platen and with theside walls of the trough liquid spaces communicating with an overflow,of rotary agitators mounted in said liquid spaces and means foroperating said agitators.

3. In a rubber Washing machine, the combination With a trough, a pair ofrolls therein, a platen mounted to oscillate above said rolls, andperforated side walls or screens arranged to form Within the trough arubber Washing compartment containing the rolls and platen and With theside Walls of the trough liquid spaces communicating with an overflow ofrotary spindles arranged in said liquid spaces parallel to the rolls andformed With longitudinally extending blades extending in oppositedirections to each other and means for rotating said spindles.

Signed at London England this 17th day of October 1910.

MORLAND MICHOLL DESSAU.

Witnesses HUGH HUGHES, CHARLES Core.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

